I'm going to make a small chicken tractor with a doghousefor the henhouse part to keep my chickies in temporarily until I can build them a bigger, nicer one. I'm a bit concerned about it getting hot and stuffy in there when they're closed in for the night, so I got to thinking: maybe I should make a sort of "screen door" out of hardware cloth to cover the doorway so they can have some fresh air on warm nights, but still be protected from predators. Would that work?